Caitlin McHugh Stamos/Instagram John Stamos is ringing ... after watching a romantic short film filled with moments from Pixar and Disney movies. Shortly after the engagement, Stamos told PEOPLE ...

"I still have a lot to do, but if my whole life was one sentence, then Billy would be the exclamation mark at the end of it," John Stamos wrote of his little boy John Stamos and Caitlin McHugh ...